摘要
采用激光熔覆技术,在Q235钢表面原位合成了TiC/Fe复合涂层,利用光学显微镜、XRD、SEM、EDS和显微硬度计对熔覆层的组织和性能进行了分析。结果表明:涂层组织致密,无裂纹和气孔,与基体之间呈良好的冶金结合;在激光束的加热作用下,Al-TiO2-C体系能在铁基熔池中反应并合成细小且弥散分布的TiC颗粒;熔覆层的平均硬度在720HV0.2左右。
TiC/Fe based composite coating was obtained on surface of Q235 steel by means of laser cladding tech- nology. The microstructure and property of the coating were investigated by optical microscope, XRD, SEM, EDS and micro-hardness tester. The results show that the coatings have good performance such as compact structure, crack-flee, pore-free and metallurgical bonding with the substrate; During the laser cladding processes, TiC particulates are synthesized by a in-situ reaction in a Al-TiO2 C system. The micro-hardness of the coating is averagely 720HV0.2.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2011年第6期7-9,49,共4页
Surface Technology
基金
贵阳市科技局工业类项目(筑科工合同字[2009]1-047号)
